Austin (AUS) Flight Delays: Rate, Best Hours and Airlines
Austin (AUS) is covered here with a statistics page (it is not one of the 22 full guide airports): 21.6% of flights departing AUS arrived 15 or more minutes late across 261,449 flights, January 2023 to December 2025. Southwest Airlines operated 42.7% of those departures. The worst scheduled departure hours are 9 PM (33.3%) and 6 PM (32.3%); 5 AM is the best at 6.5%. 0.98% of scheduled AUS departures were cancelled in 2024 to 2025.
These figures are historical US domestic rates, not a forecast for one departure. Use the per-flight delay estimate before you book.
Delay window: January 2023 to December 2025. Cancellation window: 2024 to 2025. Last updated: 2026-10-18. Delayed means a flight arrived 15 or more minutes after its scheduled arrival, the BTS and DOT on-time standard. Cancelled and diverted flights are excluded from delay rates. Historical BTS figures are separate from DelayGuard's per-flight model probability and from live FAA, weather and ground-delay status.
Predict a AUS flight
Historical BTS on-time (15+ min) at AUS
Sample size: 261,449 flights, window: January 2023 to December 2025. Delay rate 21.6%. Cancellation rate 0.98% of 172,075 scheduled flights, 2024 to 2025.
Why AUS runs the way it does
Southwest Airlines flew 42.7% of AUS departures in the window, and its flights ran 22.0% late, in line with the airport as a whole. With one carrier that large, AUS's delay record largely follows how Southwest Airlines runs its schedule.
AUS delays peak in July (28.7%), June (28.5%) and May (26.8%) and are lowest in September (16.8%). That shape is consistent with the summer thunderstorm season, when convective weather builds through the afternoon and slows arrivals and departures.
Delays build through the day: 9.4% of flights scheduled before 8 AM ran late against 32.3% after 8 PM. That is the pattern BTS describes as late-arriving aircraft, where a previous flight with the same aircraft arriving late makes the next departure late.
Best and worst times to fly from AUS
AUS delay rate by scheduled departure hour (hours with 100+ flights)| Hour | Delayed 15+ min | Flights |
|---|
| 5 AM | 6.5% | 11,388 |
| 6 AM | 8.5% | 19,132 |
| 7 AM | 12.0% | 18,998 |
| 8 AM | 12.9% | 15,310 |
| 9 AM | 13.9% | 13,663 |
| 10 AM | 15.8% | 14,215 |
| 11 AM | 16.8% | 12,876 |
| 12 PM | 18.4% | 17,986 |
| 1 PM | 21.8% | 15,667 |
| 2 PM | 25.0% | 18,024 |
| 3 PM | 27.4% | 18,328 |
| 4 PM | 31.0% | 18,467 |
| 5 PM | 32.3% | 15,512 |
| 6 PM | 32.3% | 15,877 |
| 7 PM | 30.5% | 15,855 |
| 8 PM | 32.2% | 10,376 |
| 9 PM | 33.3% | 6,619 |
| 10 PM | 30.5% | 3,089 |
AUS delays and cancellations by month
AUS by month| Month | Delayed 15+ min | Flights | Cancelled |
|---|
| Jan | 20.4% | 19,607 | 2.89% |
| Feb | 17.1% | 18,131 | 0.39% |
| Mar | 20.9% | 22,087 | 0.87% |
| Apr | 22.0% | 21,797 | 0.64% |
| May | 26.8% | 23,034 | 1.32% |
| Jun | 28.5% | 22,699 | 0.81% |
| Jul | 28.7% | 23,230 | 1.84% |
| Aug | 19.5% | 22,217 | 0.93% |
| Sep | 16.8% | 21,384 | 0.35% |
| Oct | 18.6% | 23,476 | 0.49% |
| Nov | 18.4% | 21,783 | 0.75% |
| Dec | 19.4% | 22,004 | 0.53% |
Airlines at AUS
Carriers flying from AUS (1,000+ flights)| Airline | Share of departures | Delayed 15+ min | Flights | Cancelled |
|---|
| Southwest Airlines | 42.7% | 22.0% | 111,549 | 0.59% |
| American Airlines | 15.5% | 22.3% | 40,574 | 1.78% |
| Delta Air Lines | 12.9% | 16.9% | 33,724 | 0.82% |
| United Airlines | 11.0% | 18.5% | 28,744 | 1.18% |
| SkyWest Airlines | 4.9% | 23.5% | 12,826 | 0.61% |
| Envoy Air | 4.5% | 23.4% | 11,659 | 2.26% |
| Alaska Airlines | 3.0% | 21.5% | 7,911 | 1.80% |
| Spirit Airlines (ceased 2 May 2026) | 1.7% | 30.5% | 4,549 | 1.86% |
| Allegiant Air | 1.2% | 24.7% | 3,053 | 1.27% |
| Frontier Airlines | 1.0% | 31.0% | 2,743 | 1.78% |
Regional operators are reported separately from the airline brands they fly for.
Routes from AUS
Routes from AUS (500+ flights)| Route | Delayed 15+ min | Flights | Cancelled | Link |
|---|
| AUS to DFW | 24.3% | 14,201 | 2.86% | Predict |
| AUS to DEN | 20.3% | 13,819 | 0.78% | Predict |
| AUS to ATL | 16.7% | 12,870 | 1.09% | Predict |
| AUS to LAX | 20.4% | 12,298 | 0.53% | Predict |
| AUS to PHX | 19.4% | 10,026 | 0.66% | Predict |
| AUS to LAS | 23.8% | 9,567 | 0.45% | Predict |
| AUS to ORD | 20.2% | 9,257 | 0.96% | Predict |
| AUS to BNA | 20.5% | 8,691 | 0.59% | Predict |
| AUS to MCO | 24.4% | 8,253 | 1.16% | Predict |
| AUS to DAL | 18.1% | 7,661 | 1.48% | Predict |
| AUS to IAH | 22.5% | 7,003 | 1.53% | Predict |
| AUS to JFK | 22.6% | 6,913 | 1.44% | Predict |
| AUS to SFO | 20.6% | 6,586 | 1.44% | Predict |
| AUS to SAN | 25.3% | 6,179 | 0.84% | Predict |
| AUS to SEA | 17.1% | 6,008 | 1.25% | Predict |
Questions
- How often are flights delayed at AUS?
- 21.6% of flights departing AUS arrived 15 or more minutes late across 261,449 flights, January 2023 to December 2025 (BTS). Across all US domestic flights in the data, the rate is 21.2%.
- What is the best time to fly from AUS?
- Early departures run best. 5 AM flights ran 6.5% late (11,388 flights), 6 AM flights ran 8.5% late (19,132 flights) and 7 AM flights ran 12.0% late (18,998 flights). The worst hours are 9 PM (33.3%), 6 PM (32.3%) and 5 PM (32.3%).
- Which month is worst for delays at AUS?
- July has the highest delay rate at 28.7%. September is the lowest at 16.8%.
- Which airline has the best on-time record at AUS?
- Among carriers still flying with at least 5,000 flights from AUS, Delta Air Lines has the lowest delay rate at 16.9% (33,724 flights). SkyWest Airlines is highest at 23.5%. Regional operators such as SkyWest are reported separately from the airline brands they fly for.
- How often are AUS flights cancelled?
- 0.98% of 172,075 scheduled departures from AUS were cancelled in 2024 to 2025. The US figure over the same period is 1.41%. See the full ranking on the cancellation rates page.
- Does DelayGuard show live delays at AUS?
- The predictor covers AUS flights with a model probability that combines history, weather and FAA data. This page shows historical BTS figures only.